Design This study is a parallel group randomised un-blinded trial with equal allocation to evaluate and compare the success of ART with HVGIC and composite restorations in class II cavities in permanent molars.

Study population The study populations included 154 participants who were selected from 17 different schools of Bauru and adjoining areas in Sao Paulo, Brazil. Children with good general and oral health and having 1 or 2 class II cavities were chosen. Only one restoration per child which exhibited good occlusal contact was finally chosen for the purpose of study. The participants were then stratified as per DMFT-score and cavity size. After stratifying the participants in four conglomerates, they were randomly allocated to either ART with HVGIC or composite restoration group. Later, the participants were recalled at 6 and 12 months and the restorations were evaluated using ART and modified-USPHS criteria.

Data analysis Frequency statistics, which included chi square, chi square for trend and Fisher's exact test, were used for determining the association between restoration type and different baseline variables and for determining the association between distribution of scores obtained with ART and composite restorations for different evaluation criteria.

Results With ART criteria, success rates of ART and composite restoration were found to be 98.7% and 100% at 6 months while at 12 months the success rates were observed to be 98.7% and 95.8%, respectively. The distribution of scores at both the time periods was found to be statistically significant (p = 0.033). Same success rates were observed when the restorations were evaluated using modified-USPHS criteria, with statistical difference at the 6 month post-operative recall (p = 0.001), and non-significant difference at the 12 month recall visit (p = 0.310). Survival rates of ART and composite restoration were observed to be 94.8% and 98.7% with no-significant difference in the survival curves (p = 0.173)

Conclusions In class II cavities in permanent molars, ART restorations with high viscosity GIC, done in a school setting exhibited similar success rates as composite restoration done in a clinical setting.

设计本研究是一项平行组随机非盲试验，分配相等，以评估和比较 ART 与 HVGIC 和复合修复体在恒磨牙 II 类蛀牙中的成功。

研究人群研究人群包括 154 名参与者，他们来自巴西圣保罗的 Bauru 和毗邻地区的 17 所不同学校。选择具有良好一般和口腔健康并具有 1 或 2 个 II 类蛀牙的儿童。最终每个孩子只有一个表现出良好咬合接触的修复体被选择用于研究目的。然后根据 DMFT 评分和空腔大小对参与者进行分层。在对四个企业集团的参与者进行分层后，他们被随机分配到带有 HVGIC 的 ART 组或复合修复组。后来，参与者在 6 个月和 12 个月时被召回，并使用 ART 和修改后的 USPHS 标准对修复体进行了评估。

数据分析频率统计，包括卡方、趋势卡方和 Fisher 精确检验，用于确定修复体类型与不同基线变量之间的关联，以及确定通过 ART 获得的分数分布与不同评估的复合修复体之间的关联标准。

结果根据ART标准，ART和复合修复的成功率在6个月时分别为98.7%和100%，而在12个月时的成功率分别为98.7%和95.8%。发现两个时间段的分数分布具有统计学意义（p = 0.033）。当使用修改后的 USPHS 标准评估修复体时，观察到相同的成功率，在术后 6 个月召回时有统计学差异（p = 0.001），在 12 个月召回访视时差异不显着（p = 0.310）。ART 和复合修复的存活率分别为 94.8% 和 98.7%，存活曲线无显着差异 (p = 0.173)

结论在恒磨牙的 II 类蛀牙中，在学校环境中进行的高粘度 GIC ART 修复体的成功率与在临床环境中进行的复合修复体相似。